The star 61 Cygni, in the constellation Cygnus, is a little more than 11 light-years from Earth. Which of the following correctly estimates the time it would take to reach 61 Cygni, based on speed of travel? (A)22 years traveling at twice the speed of light
(B)11 years traveling at the speed of light
(C)5.5 years traveling at half the speed of light
(D)1.1 years traveling at one-tenth the speed of light.
Please help

1. the geologists have established a set of principals that can can be used o determine the relative ages of rock. this principal is applied to sedimentary and volcanic rocks. the rocks exposed to wall of grand canyon has layers and by studying the number of horizontal layers in the rock(strata) the relative age can be determined. the layer first formed will appear at the bottom and the the layer of strata last formed appear at the top. by using this information the approximate age of rocks can be determined.

2. carbon dating is used to find the relative age of rock in numbers which means for the rocks that has age between 1-70,000 years.

3. for the rocks of age range between 1,000 - billion of years potassium-argon dating is used.